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A Study of Influence of Servo-Control Strategy on Machining Efficiency in Micro-EDM

  • Qi Jing
  • Jian Li
  • Yongbin Zhang
  • Lingbao KongEmail author
  • Min Xu
Original Articles

Abstract

Micro-electrical discharge machining (micro-EDM) is a non-contact manufacturing technology that is based upon the erosion effect of a spark. It is a significant method for machining hard-to-cut materials and fabricating micro-scale structures. However, the traditional servo-control strategy, which is widely used in micro-EDM, tends to make the process unstable due to the tiny pulse discharge energy, high pulse discharge frequency, and complex discharge state. As a result, the effective discharge ratio and processing efficiency are low, which increases the cost and so limits the application of this technology. To solve this problem, a simulation model is established in this paper to analyze the negative influence on machining efficiency by traditional servo-control strategy. Then, a self-adaptive servo-control strategy is proposed to adjust the feed speed to match up with the actual material removal rate. Simulation and experimental studies are undertaken to verify the effectiveness and validity of the proposed strategy. The results demonstrate that feed speed can converge gradually under the self-adaptive servo-control strategy and the effective discharge ratio and processing efficiency are significantly improved.

Keywords

Self-adaptive servo control Machining efficiency Effective discharge ratio Material removal rate Micro-EDM 

Notes

Acknowledgements

The authors would like to express their sincere thanks for the financial support from National Key R&D Program of China (Project Nos. 2017YFA0701200, 2016YFF0102003), Shanghai Science and Technology Committee Innovation Grand (Grant No. 17JC1400601), and Science Challenging Program of CAEP (Grant No. JCKY2016212A506-0106).

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Copyright information

© International Society for Nanomanufacturing and Tianjin University and Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Shanghai Engineering Research Center of Ultra-Precision Optical ManufacturingFudan UniversityShanghaiChina
  2. 2.Institute of Machinery Manufacturing TechnologyChina Academy of Engineering PhysicsMianyangChina

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